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-rw-r--r--arch/powerpc/platforms/iseries/irq.c400
1 files changed, 0 insertions, 400 deletions
diff --git a/arch/powerpc/platforms/iseries/irq.c b/arch/powerpc/platforms/iseries/irq.c
deleted file mode 100644
index b210345..0000000
--- a/arch/powerpc/platforms/iseries/irq.c
+++ /dev/null
@@ -1,400 +0,0 @@
-/*
- * This module supports the iSeries PCI bus interrupt handling
- * Copyright (C) 20yy <Robert L Holtorf> <IBM Corp>
- * Copyright (C) 2004-2005 IBM Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the:
- * Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307 USA
- *
- * Change Activity:
- * Created, December 13, 2000 by Wayne Holm
- * End Change Activity
- */
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/threads.h>
-#include <linux/smp.h>
-#include <linux/param.h>
-#include <linux/string.h>
-#include <linux/bootmem.h>
-#include <linux/irq.h>
-#include <linux/spinlock.h>
-
-#include <asm/paca.h>
-#include <asm/iseries/hv_types.h>
-#include <asm/iseries/hv_lp_event.h>
-#include <asm/iseries/hv_call_xm.h>
-#include <asm/iseries/it_lp_queue.h>
-
-#include "irq.h"
-#include "pci.h"
-#include "call_pci.h"
-
-#ifdef CONFIG_PCI
-
-enum pci_event_type {
- pe_bus_created = 0, /* PHB has been created */
- pe_bus_error = 1, /* PHB has failed */
- pe_bus_failed = 2, /* Msg to Secondary, Primary failed bus */
- pe_node_failed = 4, /* Multi-adapter bridge has failed */
- pe_node_recovered = 5, /* Multi-adapter bridge has recovered */
- pe_bus_recovered = 12, /* PHB has been recovered */
- pe_unquiese_bus = 18, /* Secondary bus unqiescing */
- pe_bridge_error = 21, /* Bridge Error */
- pe_slot_interrupt = 22 /* Slot interrupt */
-};
-
-struct pci_event {
- struct HvLpEvent event;
- union {
- u64 __align; /* Align on an 8-byte boundary */
- struct {
- u32 fisr;
- HvBusNumber bus_number;
- HvSubBusNumber sub_bus_number;
- HvAgentId dev_id;
- } slot;
- struct {
- HvBusNumber bus_number;
- HvSubBusNumber sub_bus_number;
- } bus;
- struct {
- HvBusNumber bus_number;
- HvSubBusNumber sub_bus_number;
- HvAgentId dev_id;
- } node;
- } data;
-};
-
-static DEFINE_SPINLOCK(pending_irqs_lock);
-static int num_pending_irqs;
-static int pending_irqs[NR_IRQS];
-
-static void int_received(struct pci_event *event)
-{
- int irq;
-
- switch (event->event.xSubtype) {
- case pe_slot_interrupt:
- irq = event->event.xCorrelationToken;
- if (irq < NR_IRQS) {
- spin_lock(&pending_irqs_lock);
- pending_irqs[irq]++;
- num_pending_irqs++;
- spin_unlock(&pending_irqs_lock);
- } else {
- printk(KERN_WARNING "int_received: bad irq number %d\n",
- irq);
- HvCallPci_eoi(event->data.slot.bus_number,
- event->data.slot.sub_bus_number,
- event->data.slot.dev_id);
- }
- break;
- /* Ignore error recovery events for now */
- case pe_bus_created:
- printk(KERN_INFO "int_received: system bus %d created\n",
- event->data.bus.bus_number);
- break;
- case pe_bus_error:
- case pe_bus_failed:
- printk(KERN_INFO "int_received: system bus %d failed\n",
- event->data.bus.bus_number);
- break;
- case pe_bus_recovered:
- case pe_unquiese_bus:
- printk(KERN_INFO "int_received: system bus %d recovered\n",
- event->data.bus.bus_number);
- break;
- case pe_node_failed:
- case pe_bridge_error:
- printk(KERN_INFO
- "int_received: multi-adapter bridge %d/%d/%d failed\n",
- event->data.node.bus_number,
- event->data.node.sub_bus_number,
- event->data.node.dev_id);
- break;
- case pe_node_recovered:
- printk(KERN_INFO
- "int_received: multi-adapter bridge %d/%d/%d recovered\n",
- event->data.node.bus_number,
- event->data.node.sub_bus_number,
- event->data.node.dev_id);
- break;
- default:
- printk(KERN_ERR
- "int_received: unrecognized event subtype 0x%x\n",
- event->event.xSubtype);
- break;
- }
-}
-
-static void pci_event_handler(struct HvLpEvent *event)
-{
- if (event && (event->xType == HvLpEvent_Type_PciIo)) {
- if (hvlpevent_is_int(event))
- int_received((struct pci_event *)event);
- else
- printk(KERN_ERR
- "pci_event_handler: unexpected ack received\n");
- } else if (event)
- printk(KERN_ERR
- "pci_event_handler: Unrecognized PCI event type 0x%x\n",
- (int)event->xType);
- else
- printk(KERN_ERR "pci_event_handler: NULL event received\n");
-}
-
-#define REAL_IRQ_TO_SUBBUS(irq) (((irq) >> 14) & 0xff)
-#define REAL_IRQ_TO_BUS(irq) ((((irq) >> 6) & 0xff) + 1)
-#define REAL_IRQ_TO_IDSEL(irq) ((((irq) >> 3) & 7) + 1)
-#define REAL_IRQ_TO_FUNC(irq) ((irq) & 7)
-
-/*
- * This will be called by device drivers (via enable_IRQ)
- * to enable INTA in the bridge interrupt status register.
- */
-static void iseries_enable_IRQ(struct irq_data *d)
-{
- u32 bus, dev_id, function, mask;
- const u32 sub_bus = 0;
- unsigned int rirq = (unsigned int)irqd_to_hwirq(d);
-
- /* The IRQ has already been locked by the caller */
- bus = REAL_IRQ_TO_BUS(rirq);
- function = REAL_IRQ_TO_FUNC(rirq);
- dev_id = (REAL_IRQ_TO_IDSEL(rirq) << 4) + function;
-
- /* Unmask secondary INTA */
- mask = 0x80000000;
- HvCallPci_unmaskInterrupts(bus, sub_bus, dev_id, mask);
-}
-
-/* This is called by iseries_activate_IRQs */
-static unsigned int iseries_startup_IRQ(struct irq_data *d)
-{
- u32 bus, dev_id, function, mask;
- const u32 sub_bus = 0;
- unsigned int rirq = (unsigned int)irqd_to_hwirq(d);
-
- bus = REAL_IRQ_TO_BUS(rirq);
- function = REAL_IRQ_TO_FUNC(rirq);
- dev_id = (REAL_IRQ_TO_IDSEL(rirq) << 4) + function;
-
- /* Link the IRQ number to the bridge */
- HvCallXm_connectBusUnit(bus, sub_bus, dev_id, d->irq);
-
- /* Unmask bridge interrupts in the FISR */
- mask = 0x01010000 << function;
- HvCallPci_unmaskFisr(bus, sub_bus, dev_id, mask);
- iseries_enable_IRQ(d);
- return 0;
-}
-
-/*
- * This is called out of iSeries_fixup to activate interrupt
- * generation for usable slots
- */
-void __init iSeries_activate_IRQs()
-{
- int irq;
- unsigned long flags;
-
- for_each_irq (irq) {
- struct irq_desc *desc = irq_to_desc(irq);
- struct irq_chip *chip;
-
- if (!desc)
- continue;
-
- chip = irq_desc_get_chip(desc);
- if (chip && chip->irq_startup) {
- raw_spin_lock_irqsave(&desc->lock, flags);
- chip->irq_startup(&desc->irq_data);
- raw_spin_unlock_irqrestore(&desc->lock, flags);
- }
- }
-}
-
-/* this is not called anywhere currently */
-static void iseries_shutdown_IRQ(struct irq_data *d)
-{
- u32 bus, dev_id, function, mask;
- const u32 sub_bus = 0;
- unsigned int rirq = (unsigned int)irqd_to_hwirq(d);
-
- /* irq should be locked by the caller */
- bus = REAL_IRQ_TO_BUS(rirq);
- function = REAL_IRQ_TO_FUNC(rirq);
- dev_id = (REAL_IRQ_TO_IDSEL(rirq) << 4) + function;
-
- /* Invalidate the IRQ number in the bridge */
- HvCallXm_connectBusUnit(bus, sub_bus, dev_id, 0);
-
- /* Mask bridge interrupts in the FISR */
- mask = 0x01010000 << function;
- HvCallPci_maskFisr(bus, sub_bus, dev_id, mask);
-}
-
-/*
- * This will be called by device drivers (via disable_IRQ)
- * to disable INTA in the bridge interrupt status register.
- */
-static void iseries_disable_IRQ(struct irq_data *d)
-{
- u32 bus, dev_id, function, mask;
- const u32 sub_bus = 0;
- unsigned int rirq = (unsigned int)irqd_to_hwirq(d);
-
- /* The IRQ has already been locked by the caller */
- bus = REAL_IRQ_TO_BUS(rirq);
- function = REAL_IRQ_TO_FUNC(rirq);
- dev_id = (REAL_IRQ_TO_IDSEL(rirq) << 4) + function;
-
- /* Mask secondary INTA */
- mask = 0x80000000;
- HvCallPci_maskInterrupts(bus, sub_bus, dev_id, mask);
-}
-
-static void iseries_end_IRQ(struct irq_data *d)
-{
- unsigned int rirq = (unsigned int)irqd_to_hwirq(d);
-
- HvCallPci_eoi(REAL_IRQ_TO_BUS(rirq), REAL_IRQ_TO_SUBBUS(rirq),
- (REAL_IRQ_TO_IDSEL(rirq) << 4) + REAL_IRQ_TO_FUNC(rirq));
-}
-
-static struct irq_chip iseries_pic = {
- .name = "iSeries",
- .irq_startup = iseries_startup_IRQ,
- .irq_shutdown = iseries_shutdown_IRQ,
- .irq_unmask = iseries_enable_IRQ,
- .irq_mask = iseries_disable_IRQ,
- .irq_eoi = iseries_end_IRQ
-};
-
-/*
- * This is called out of iSeries_scan_slot to allocate an IRQ for an EADS slot
- * It calculates the irq value for the slot.
- * Note that sub_bus is always 0 (at the moment at least).
- */
-int __init iSeries_allocate_IRQ(HvBusNumber bus,
- HvSubBusNumber sub_bus, u32 bsubbus)
-{
- unsigned int realirq;
- u8 idsel = ISERIES_GET_DEVICE_FROM_SUBBUS(bsubbus);
- u8 function = ISERIES_GET_FUNCTION_FROM_SUBBUS(bsubbus);
-
- realirq = (((((sub_bus << 8) + (bus - 1)) << 3) + (idsel - 1)) << 3)
- + function;
-
- return irq_create_mapping(NULL, realirq);
-}
-
-#endif /* CONFIG_PCI */
-
-/*
- * Get the next pending IRQ.
- */
-unsigned int iSeries_get_irq(void)
-{
- int irq = NO_IRQ_IGNORE;
-
-#ifdef CONFIG_SMP
- if (get_lppaca()->int_dword.fields.ipi_cnt) {
- get_lppaca()->int_dword.fields.ipi_cnt = 0;
- smp_ipi_demux();
- }
-#endif /* CONFIG_SMP */
- if (hvlpevent_is_pending())
- process_hvlpevents();
-
-#ifdef CONFIG_PCI
- if (num_pending_irqs) {
- spin_lock(&pending_irqs_lock);
- for (irq = 0; irq < NR_IRQS; irq++) {
- if (pending_irqs[irq]) {
- pending_irqs[irq]--;
- num_pending_irqs--;
- break;
- }
- }
- spin_unlock(&pending_irqs_lock);
- if (irq >= NR_IRQS)
- irq = NO_IRQ_IGNORE;
- }
-#endif
-
- return irq;
-}
-
-#ifdef CONFIG_PCI
-
-static int iseries_irq_host_map(struct irq_host *h, unsigned int virq,
- irq_hw_number_t hw)
-{
- irq_set_chip_and_handler(virq, &iseries_pic, handle_fasteoi_irq);
-
- return 0;
-}
-
-static int iseries_irq_host_match(struct irq_host *h, struct device_node *np)
-{
- /* Match all */
- return 1;
-}
-
-static struct irq_host_ops iseries_irq_host_ops = {
- .map = iseries_irq_host_map,
- .match = iseries_irq_host_match,
-};
-
-/*
- * This is called by init_IRQ. set in ppc_md.init_IRQ by iSeries_setup.c
- * It must be called before the bus walk.
- */
-void __init iSeries_init_IRQ(void)
-{
- /* Register PCI event handler and open an event path */
- struct irq_host *host;
- int ret;
-
- /*
- * The Hypervisor only allows us up to 256 interrupt
- * sources (the irq number is passed in a u8).
- */
- irq_set_virq_count(256);
-
- /* Create irq host. No need for a revmap since HV will give us
- * back our virtual irq number
- */
- host = irq_alloc_host(NULL, IRQ_HOST_MAP_NOMAP, 0,
- &iseries_irq_host_ops, 0);
- BUG_ON(host == NULL);
- irq_set_default_host(host);
-
- ret = HvLpEvent_registerHandler(HvLpEvent_Type_PciIo,
- &pci_event_handler);
- if (ret == 0) {
- ret = HvLpEvent_openPath(HvLpEvent_Type_PciIo, 0);
- if (ret != 0)
- printk(KERN_ERR "iseries_init_IRQ: open event path "
- "failed with rc 0x%x\n", ret);
- } else
- printk(KERN_ERR "iseries_init_IRQ: register handler "
- "failed with rc 0x%x\n", ret);
-}
-
-#endif /* CONFIG_PCI */
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